<template>
  <div>
    <ul>
      <li v-for="(item, index) in arr" :key="index">
        {{ item }}
        <button @click="del(index)">删除</button>
      </li>
    </ul>
    <button @click="add">生成</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      arr:[1,3,5]
    }
  },
  methods: {
    del(index) {
this.arr.splice(index,1)
    },
    add() {
      this.arr.push(Math.floor(Math.random()*10))
    }
  }
}
</script>

<style lang="scss" scoped></style>
